Earth-scraping machine.



N0 855,336. PATENTED MAY 28, 1907.

W. & J. RANDALL.

EARTH SGRAPING MACHINE.

APPLICATION FILED SEPT.17, 1906.

2 SHEETS-SHEET l.

4 V WITNESSES INVENTORS flew-,1 oizfialzdall JJzn nJaZZ ATTORNEYS.

7 0 9 1 om 2 Y A M D E T N E T A P EARTH SGRAPING MACHINE.

APPLICATION FILED 8EPT.17, 1906.

2 SHEETS-SHEET 2.

WITNESSES UNITED STATES PATENT OFFICE.

' EARTH-SORAPING MACHINE.

Specification of Letters Patent.

Application filed September 17, 1906. seen mt'ssasvs.

Patented ma 28, 1907.

To all whom it may concern."

Be it known that we, WELLINGTON RAN- DALL and JOHN RANDALL, both citizens of the United States, and residents of Marysville, in the county of Snohomish and State of Washington, have invented a new and Im roved Earth-Scraping Machine, of which the ollowing is a full, clear, and exact description.

This invention relates to certain improveinents in earth scraping and dredging machines in which the cutting or scraping edge is automatically removed or raised from the ground when the scraper is filled, and in which the material may be automatically ejected from the scraper when it reaches the point; at which it is desired to dump the materia Our improved scraper is also provided with a novel steering means by which it may be guided in any direction desired, and involves certain other novel features of construction hereinafter set forth and pointed out in the claims.

Reference is to be had to the accompanying drawings forming a partof this specifica-- of one end of the scraper.

The main body portion of our improved scraper comprises an open-ended box rectangular in cross section and having vertical sides 1, a top 2, and a bottom 3. The sides referably extend a slight distance below the bottom and are slightly curved, so as to form runners 4, as shown in Fig. 1. The runners are sub-divided into compartments by two vertical partitions 5 and 6, each of which is perforated to receive the plunger arms 7.

hese plunger arms are preferably connected together atone end'bya'cross member 8, while at the other end they are rigidly secured in any suitable manner to the plunger head 9, the latter being of a size adapted to closely fit the'interior of the box and capable of moving longitudinally of. the same from the artitlon 5 to the open end.

inged to the bottom of the box at the front open end, is a scraping or cutting plate 10, carrying arms 11 extending upwardly clined downward through the slot. Secured to the from the outer edge at points adjacent the ends and having a cross bar 12 connecting the upper ends of'the arms 11. This cross bar is connected to -the.plunger head9 by two chains 13 of such a len th that the chains will bedrawn taut when t e plunger head is forced against the partition 5 and the bar 12 is drawn against the open end of the box or body ortion. The arms 11 are connected to the si es of the box or body portion by chains 14 of such a length that they are drawn taut when the cutting or scraping plate 10 is iny at the desired angle.

Connected to the sides of the body portion adjacent the front end thereof, are two chains or other suitable means by which the' device may be moved along the ground, While at the opposite end is located our improved steering apparatus comprising a plurality of rud ders 15 pivotally secured to the bottom of the body portion and capable of being forced down through slots in said bottom. These rudders extend backward at different angles and eachis provided with. means for raising anddowering the same. means comprises a'link 16 secured to the upper edge of the rudder at its back end and Preferably these connected to a screw-threaded rod 17, ex-

tending upwardly body portion an having a handle 18 on its upper ends. By turnin any one of the handles 18 the correspon ing rudder may be through the top of the forced down through the slot in the bottom 1 of the body portion and the back: end of the 1 device will be moved in a lateral direction to an extent dependin upon the inclination of the rudder and the istance which it is forced back side of the partition 5 aretwo'pulleys 19 overwhich pass cables 20,

- one end of each of the latter extending back- ICC a slowly forces the plunger 9 back toward the partition The depth of the cut made by the plate 10 is controlled by the length of the chains 14 and the device is guided by lowering any one of the rudders 15. When the entire front-end of the machine is filled as indicated in Fig. 3, the plunger will have been forced back to the partition 5, and as the chains 13 are drawn taut, they draw back on the arms 11 and raise the cutting plate, sothat it no longer engages with the ground.

\The device thus automatically ceases to scrape when the same is filled, and it may 5 distance on the curved runners 4. "scraper has reached 118 destination the source then be easily moved along to any required When the of power is detached from the front end and attached to. the cables and the back end I of the machine. Upojn drawing backward on the cables 20 the first tendency is to force the plunger 9 in the opposite direction with out involving any movement whatever of the body portion.

After the plunger 9 has moved to the end of the machine and all of the material has been ejected, then further pulling on the cables 20 draws the machine back to the starting point.

Ifdesired, the cables 20 maybe provided with branches connecting to the hooks 21 on the sides of the back end, said branches being of' sufficient length that they will not be drawn taut until after the plunger 9 has been forced to the end of-the body.

Having thus described our invention, we claim as new and desire to secure by Letters Patent:

1. A scraping machine, comprising an i open-ended body portion, a scraping plate pivotally'secured to the lower edge of the body portion at one end thereof, and means for automatically 'raising'said scraping plate when the body portionbecomes' filled.

2. A scraping machine, comprising an open-ended body portion, a scraping plate pivotally secured to the body portion adja cent one end thereof, arms secured to the outer edge of said scraping plate, and means portion, and means connecting said plunger and said scraping plate, whereby the latter is moved u ward when the body portion becomes filledl 4. A scraping machine, comprising an open-ended body portion, a plunger located therein, and means secured to the back end for forcing said plunger toward the front end of the machine to eject the material, and for drawing the machine in the opposite directron.

5. A scraping machine, comprising an open-ended body portion, a plunger located therein, plunger arms secured to said plunger, and means connected to said plunger arms for forcing said plunger toward the front end of lthe machine to eject the excavated materla 6. A scraping machine, comprising an open-ended body portion, a scrapin plate pivotally secured to the front end'a jacent the lower side, a plunger within saidbody portion, means connected'to said plunger for raising said scraping plate' when the machine becomes filled, and means for moving said plunger forward to'eject the material.

7. A scrapin machine, comprising an open-ended bo y portion, runners located along the opposite sides, and means for steering the machine, comprising a plurality of rudders permanently set 'at diflerent angles and means for. raising and lowering said rudders.

8. A scraping machine, comprising an open-ended body portion rectan ular in cross section, -a scraping late pivotal y connected to the front end 0 the body portion at the lower edge thereof, means for automatically raising said scraping plate when the body portion becomes filled, means for ejecting the material as the machine is drawn backward, and means for steering the machine, said last mentioned means comprising a plurality of rudders mounted at diverging angles and each provided with means for raising and lowering the same.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses. t

WELLINGTON RANDALL. 1 JOHN RANDALL. Witnesses: MARY E. SAUNDERS,

CHAs. L. BEAMAN. 

